Attaching door-knobs to spindles



(No Model.)

B. M. KEATING.

ATTAGHING'DOOR KNOBS TO SPINDLE. No. 321,818. Patented July 7, 1885.-

WITNESSES INVENTOR ATTORNEY UNTTED STATES ATENT Urrrcn.

ROBERT M. KEATING, OF SPRINGFIELD, MASSACHUSETTS.

ATTACHING DOOR-KNOBS TO SPINDLES.

SPECIFICATION forming part of Letters Patent No. 321,818, dated July '7,1885.

Application filed December 15, 1884. (No model.)

To aZZ whom it may concern:

Be it known that I, ROBERT M. KEATING, a citizen of the United States,residing at Springfield, in the county of Hampden and State ofMassachusetts, have invented new and useful Improvements in AttachingDoor- Knobs to Spindles, of which the following is a specification.

This invention relates to improvements in means for attaching door-knobsto spindles, the object being to provide improved devices for attachingthe shank of the knob to the spindle, whereby the two will besusceptible of closer adjustment relative to the thickness of the doorthan heretofore without using washers, and whereby an improvedattachment is provided which prevents any pulling force from beingexerted on the screw, whereby the latter becomes loosened.

In the drawings, forming part of this speci fication, Figure l is a sideelevation, partly in section, of two door-knobs and a spindle, in whichthe former are shown secured to the latter, the fastening devicesthereof being con structed according to my invention. Fig. 2 is a viewof the locking-shoe separate from the knobshank.

In the drawings, (Z is the knob-spindle of the usual square form incross-section, but having, instead of a series of sockets therein toreceive the end of the screw 0 on one side thereof, a series ofserrations, 2, on one side of the part of the spindle which enters theknob-shank b. Each of said serrations is made with one inclined face,and one face at right angles to the length of the spindle and facingfrom the end of the latter. The knob a has the usual shank b; butinstead of having the usual square sh aped plain-faced socket in it toreceive the end of spindle (I, one of the faces of the latter has atransverse bar, h, projecting from it toward the spindle, having sidesat right angles to the latter, or in a plane corresponding with saidright-angle faces of the serrations 2 on the spindle. The shank I) isprovided with the screw a, passing through said bar h. A locking-shoe,e, an enlarged view of which is shown in Fig. 2, has one face serratedto fit the aforesaid serrations on the spindle cl, and its opposite sidehas a groove, '0, across it in which the bar h fits, as shown in Fig. 1.The thickness of shoe 6 is such that when screw 0 is turned out from itshole in shank b the shoe may be lifted up away from the serrations inthe spindle, so that those, 2, of the shoe will not engage with thelatter, thereby leaving the spindle and knob free to be adjusted, one tothe other, and after said adjustment the screw 0 is turned against shoe6, forcing its serrated face into engagement with the serrations on thespindle, and thus securely locking the knob to the spindle.

By reason of the above-described form of the serrations on the spindleand shoe, and the engagement of the sides of the slot 1; of the latterwith the bar h in the shank, any pulling force on the spindle is exertedagainst the side of the bar, and not to any extent on the screw 0, thelatter serving only to hold the shoe against the spindle, and hence thescrew is not likely to work loose and drop out. It is obvious that theserrations on the spindle and on the shoe may be made much finer thanthose herein shown, so that the movement of the shank b on the spindle,to vary the position of the former the width of one tooth, would be verylittle.

The shoe 6 may be made of any suitable metal or other material; butsteel hardened is preferable, and the serrations on both shoe andspindle have inclined faces only; but the form sliown relieves the screw0, as set forth.

What I claim as my invention is- 1. The spindle d, having serrations onone side thereof, the knob-shank b, having the bar h projecting from oneside of its spindlesocket, the shoe 6, having serrations to engage withthose on the spindle, and a groove to engage with said bar h and thescrew 0, combined and operating substantially as set forth.

2. The spindle (1, having serrations on one side thereof whose faces areformed at an incline and at right angles to the serrated side of thespindle, the knob-shank I), having the bar h projecting from one side ofits spindlesocket, the shoe 6, having serrations thereon of like form tothose on the spindle, and a groove to engage with said bar h and thescrew 0, combined and operating substantially as set forth.

ROBERT M. KEATING.

WVitnesses:

H. A. OHAPIN, J. D.'GARFIELD.

